Studies in Architecture, Universität Stuttgart / Hochschule für Gestaltung Ulm, 1967-1973, Studies in Systems Engineering, Technische Universität Berlin, 1969-1970, M.Sc. in Planning Studies, University of London / London School of Economics and Political Science, 1975-1976. Professional Practice as founding member / CEO of HHS Planer + Architekten AG, Kassel since 1980, Consultant of OECD Paris 1979-1982, founder / member of the board of directors of Eurolabors AG since 1998.Former teaching engagements at Universität Stuttgart, Universität Kassel, Universität Hannover, Centre for Infrastructure Planning Stuttgart, Queens College Dublin. Member of Bund Deutscher Architekten BDA, Deutsche Akademie für Städtebau und Landesplanung, Deutsche Gesellschaft für Nachhaltiges Bauen (DGNB), Director of UIAInternational Work Programme Sustainable Architecture of the Future 1999 – 2008, Member of the EU Programme Sustainable Construction Methods and Technologies since 2004, Member of World Economic Forum, Agenda Council on the Future of Sustainable Construction since 2008, Member of the Board of the German Sustainable Building Council (DGNB).